A portable viewer for stereo postcards (9 × 14 cm). The top of the box has a slot to hold the card and slides back and forth to focus. The lenses can be folded back into the box when open, which also has room to store postcards. The viewer was introduced in 1902 by Ernest Delay, a successful postcard publisher (Delay 1902, p. 3). In the process of patenting it, Delay apparently found that an almost identical design had been patented in 1900 by the Italian Nestor Fiocchi-Poggi (Fiocchi-Poggi 1902, p. 7). In fact, Delay used the name of Fiocchi-Poggi's invention, “le merveilleux”, in the title for his own patent.